package example.my_practice;

import lombok.extern.slf4j.Slf4j;

import java.util.HashMap;
import java.util.Map;

/**
 * @author guoQ.z
 * @date 2021/1/26 13:58
 * TODO
 */
@Slf4j
public class ListTest {

    public static void main(String[] args) {
        Map<String, String> map = new HashMap<>();
        map.put("东京", "富士山");
        map.put("上海", "虹桥");
        map.put("北京", "鸟巢");
        System.out.println(map.keySet());
    }
}
